H12-821_V1.0-ENU V2

Which BGP route will send BGP neighbors without BGP path load sharing enabled?A . All BGP routes learned from all neighborsB .  Only the best route preferred by BGPC .  Only routes learned from IBGPD .  Only routes learned from EBGPView AnswerAnswer: B

About the description about the OSPF calculating the shortest path tree stage, which is the correct?A .  The first stage calculates the Stub network segment, and the second stage calculates the router node and Transit network segment.B .  The first stage calculates routing nodes and Transit network segments, and the second stage calculates Stub network segments.C ....

By default, on a router running IS-IS in a broadcast network, how many seconds does DIS send CSNP messages?A . 10B . 3.3C . 30D . 40View AnswerAnswer: A

Which of the following descriptions about OSPF default routing is wrong?A . The OSPF default route can be issued by the Area Border Router (ABR) to issue Type 3 default LSAs to guide routers in the area to forward packets between areasB .  When the router has no exact matching route, it can forward the message through the...

The rated voltage of the cell (CELL) in the VRLA battery is ().A . 12VB . 6VC . 2VD . 1VView AnswerAnswer: C

ACL command ac1 [number] ac1-number [ match-order {autol config}], where ac1-numnbe is used to specify the number of the access control list, and the value range of ac1-number of the basic access control list is ().A . 1000~3999B . 0~1000C . 3000~3999D . 2000 ~2999View AnswerAnswer: D

Which of the following description about OSPF is correct?A . OSPF LSA is regularly updated every 30 minutesB . OSPF floods an LSU every 5sC . OSPF uses the Bellman-Ford algorithm, and each router runs the algorithm independentlyD . OSPF itself has no confirmation mechanism, so 0SPP relies on the lower layer protocol, namely TCP confirmation.View AnswerAnswer: A

Regarding the description of IGMP Snooping-working mechanism, which is the correct?A . The layer 2 switch establishes and maintains the PIM routing table on the layer 2 by continuously monitoring IGMP messages.B . When IGMP Snooping is not running, the multicast message will be broadcast on the second layer. After running IGMP Snooping, the message will no longer be...

OpenSentA . 3-1-2-5-4B . 1-3-5-2-4C . 3-5-1-2-4D . 3-1-5-2-4View AnswerAnswer: D

Which of the following is the command to configure the VRRP preemption delay?A . vrrp vrid 1 preempt-mode timer delay 20B . vrrp vrid 1 timer delay 20C . vrrp vrid 1 preempt-timer 20D . vrrp vrid 1 preempt-delay 20View AnswerAnswer: A